RSS Viewer webpart is not in list in SharePoint Site

Question

Hi,

I have created SharePoint Team Site from STS#0 web template.
I need to add OOTB RSS viewer webpart in site page.
Rss viewer webpart is not display in list while adding webpart.

It is there for Team Site which is created from GROUP#0 web template.

How can i enable RSS viewer webpart in Team Site (STS#0)?